Ring contractor



' splitting the rin Fatented Aug. 21, 1923.

meats;

aosnrrr 0. POLLACK, or oErcAsdiLLmoIs.

RING oonrnaorcn V Application filed June 2, 1921. SeriaI No. 474,501.

To (all whom it may conce'rm.

. Be it known that I, Josnrrr O. POLLACK, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Ring Contractors, of which the following is a description.

My invention relates to improvements in, .ring contractors, whereby the internal diameter of a ring may be decreased or reduced. The principal objects of my invention are to provide a device of the kind described, which may be operated quickly, and will be simple, convenient, compact, durable and satisfactory for use wherever found applicable. r

Heretofore it has been customary when reducing rings to cut away or remove a por tion of the ring, and to then solder or weld the resulting split ends together. This methodis' cumbersome and costly, and takes more or less time, and it changes a seamless ring into a seamed one after the reduction in size. \Vith my improved device it is not necessary to split the ring or remove the material therefrom, and the work may be done in a few moments By using myimproved device, a ring can. be contracted without and without injuring or marring the inside engraving on the ring or the setting thereof. 1

Many other objects and advantages of the construction'herein shown and described will be obvious to those skilled in the art from the disclosures herein given.

To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described, and more particularly pointed out in the claims. 7

In the drawings, wherein like reference characters indicate like or corresponding parts,

Figure l is an elevation of the device assembled;

Fig. 2 is a vertical section therethrough, showing the ring in place; V

Fig. 3 is a section taken substantially on the line 3-3 of Fig. l;

Fig. 4 "s a section taken substantially on the line l-Acf Fig. 1', showing the ring before pressure has been applied thereto-to contract it; and

Fig. 5 is a view similar to that shown in been applied and Fig. at, after pressure has the ring contracted.

' sired.

Referring to the drawings,where-in I have illustratedthe preferredembodiment of my invention, land 2represent mating elements or ections cooperating to forma cylindrical ring-receiving member adapted to receive a ring 5, the interior of said. sections being bored as at 3 so as to taper internally from end to end, there being a series of parallel paced annular :groovesor channeled formed in'said bored wall, said grooves progressively varying in diameter from one: end

of the memb er to the other end. These grooves are substant ally annular in outline when the sections 1 and 2 are assembled as shown. lVhile 1- have shown two sections 1 and 2, the numbenmaybe as de- In order: that the sections 1 and 2 shall not have any longitudinal or lateral displacement :when assembled, and thus avoid the possibilityof throwing the semiannulargrooves out of alignment, the same are preferably made to interengage. As shown, I have positioned pins 6 on the plane edges of oneof the mating members, so as to projectbeyond the said edges, and in the plane edges of the other cooperating mating element 1 have formed apertures, recesses or openings 7' adapted to slidab'ly-receive said pins.

Clampingmeans .8, comprising a collar,

band orthe like, is-adapted to loosely en circle or surround said assembled mating elements 1 and 2, as shown mthe drawings.

The collar is radially bored and'threaded as I" at 9 to receive a threaded screw 10 therethrough, said screw being movable radially through said'collar so as to engageand bear upon one of the sections of the mating members' 1 and 2. VVhen zthescrew is moved radially inward it forces the sections 1 and 2 toward one another, causing the ring 5 held therebetween to be contracted or reduced in diameter. g

V The operation of contracting or reducing a ring will be clearly apparent. from the drawings, and no I detailed description of the method used therefor is thought necessary. The parts 1 and 2 as they are brought together, compress the material of the ring, thereby reducing the diameter. Usually. not muchreduction in diameter is deslred w a n u but with my device. conslderable .reductlo is possible, and in a-few moments time.

lt is apparent that any number of segments 1' and 2 maybe used to make up the cylindrical body, the annular recesses or may An elongated slot recess ll'is formed radisnyOr the ringe'receiving members 1 and 2,

said slot communicating with the tapered bore 3al0ng one side th reof. The purpose of this slot, is clearly shown in Fig. 7, and is to'receive the setting'o'f a ring, the ring be- .ing positioned in the annular grooves so that its setting projects into the slot 11. The ring can be then contracted withoutengaging the setting, thus preventing any possible injury or damage thereto;

For plain rings, or that is, rings Without setting, I prefer to use a receiving member without the opening or recess'll.

Having thus described my invention, it is obvious that various immaterial modifications may be made in the same without departing from the spirit of my invention; hence I do not wish to be understood as limiting myself to the exact form, construction, arrangement and combination of: parts herein" shown and described or uses mentioned.

\Vhat I claim as new and desire to secure by Letters latent is:

1. A ring contractor of the kind described comprising acontractile member having a tapered bore adapted to receive a ring, and means for contracting said member to reduce the diameter of said ring;

2. A ring contractor comprising a contrac tile member having a tapered bore therethrough with a ring receiving annular groove internally thereof, and opening onto said bore, and means for contracting said member.

3. A ring contractor comprising in com-' -bl1'1&lIlOn a s ght contractile member having a tapered bore therethrough with a series of spaced annular grooves opening onto said bore, said grooves adapted to receive a ring selectively therein and clamping means surrounding said member for contracting it to reduce the diameter of said ring.

at. A ring contractor comprising a conractile member havinga bore therethrough, a recess laterally of and communicating with said bore, whereby a setting at'a pointon th'eperiphcry of said ring 'projectsinto said recess, and means for contracting said meme ber to'rcduce the diameter of said ring without engaging said setting.

A ring contractor comprising alcontractile member having a tapered bore there-Q tl'irough, a radial slotlongitudinally of said said member being adapted to receive a ring therein having a setting at a'point'on its periphery, the setting proyectlng into member and communicating with saidbore, i

said slot, and means for contracting said member without engaging said setting.

6. A ring contractor comprising a contractile member having a ring-receiving annular groove internally thereof, a radial recess communicating with said groove, whereby a setting on the beriphery on said ring in the groove may project into said recess, and

means for contracting said member without engagingsaid setting.

In testimony whereof, I have hereunto u u scribing witnesses.

JosErH o. roLLaoK.

si ned my name in the presence of two sub= ll itnesses JOHN lV. HILL, BERTHA HARTMANN. 

